Inking apparatus for printing machines



March 24, 1931. w SM|TH INKING APPARATUS FOR PRINTING MACHINES Filed May '8, 1950 Inventor Z hf Smith Attorney.

Patented Marf24, 1931 UNITED STATES EDGAR WILTON SMITH, or EDINBURGH, soon-BA D, Ass'IeN'oR o aywycannrrtnn ea"? Pi-A raNr f orator sons LIMITED, or LEEDSfENGLAN fi INKING APPARATUS non rnin z'rln'e MACHINES Application filed May 8, 1930, Serial No. 450,775; an al-Great Britain Maich'G, 1929.-

This invention relates to inking apparatus for printing machines, and has among its objects to provide simple and efiective means for adjusting the amount of ink taken up on 5, the periphery of the fountain roller on its rotation. In such inking apparatus it is usual to provide horizontal blades for the purpose, but such blades are open to the disadvantage that after they have been in use in one posi- 10 tion for a certain time a choking results that necessitates the screws, by which they are held, being released for the purpose of clean ing and adjustment. The invention has among its objects to avoid such and other dis- 0 advantages of horizontal blades as usually provided in such inking apparatus.

According to the invention the blade is set in an upstanding position inclined slightly over the fountain roller so that the blade is disposed substantially tangential to the fountain roller at the line of contact, and means are provided by which the lower edge of v the blade may be adjusted to a determined extent with respect to the periphery of the fountain roller by a member that is adapted to be secured in position after the adjustment is made.

The invention comprises the features hereinafter described.

0 A construction of inking apparatus according to the invention is represented, by way of example, in the accompanying drawing which is a side elevation, partly in section, of the fountain roller, blade, and blade adjusting mechanism.

In carrying the invention into eflect according to the construction represented in the drawing, the blade a is set at an upstanding inclination to the fountain roller 1) so that it lies substantially tangential to the periphery of the roller, with the lower edge adjacent the roller, whereby the lower edge has a slicing action on the ink as the ink is carried upward on the roller. For this pur pose the blade a is carried from an overhanging carrier or bridge 0 extending across the ink fountain (Z. Thus, the upper end of the blade is disposed rearwardly over the fountain roller 5 and the upper end is seeuredby such means as studs 0 to the carrier or bri dgeg upou a prepared facehaving an mchnat on--correspond ng to that which the blade is tOflSSHHlQQ Means are-provided also .mounted'upon the carrieror bridge aforesaid, bywhich the lower end of the bladed may-be precisely= set into determined position withrespect to the. periphery of the fountain roller 6 so asthu s to adjust thefidistance of of ink carriedforward by the roller in its rotation. y Such means consist of a number of:

adjusting screws provided at determined,

positions apart, set i nan upstanding position behind and slightlyabove the fountain blade but at an opposite inclination, the adjusting screws being for the purpose carried each within an externally screw-threaded bush g, the bushes being mounted at prepared positions on the carrier or bridge a, the lower ends of the bushes protruding beneath the carrier or bridge, the bushes being also internally screw-threaded for the reception of the adjusting screws which are screwthreaded to correspond. The adjusting screws may be provided at their lower ends of a conical form by which they cont-act with the rear face of the blade near its lower edge, while these adjusting screws are provided near their upper end with a flange h by which their lowermost position within their respective bushes g is determined and with a head i of convenient form for manipulation.

It will be understood that when the adj usting screws f are screwed down so that the flange h contacts with the upper end of the respective bush g. the bush, which at its upper end may be provided with a hexagonal head j, maybe rotated so that the lower conical end of the adjusting screw may be applied to the blade (1 for its deflection to the desired extent towards the periphery of the fountain roller. A transversely disposed locking screw 70 may be provided, the inner end of which may engage the bush g, whereby the bush may be looked after the setting of the blade.

It will be understood that by the means described the adjusting screws may be reset to the determined positionat any time during the printing operation to ensure uniformity in the supply of ink, While any desired adjustment of the supply of ink may be secured by resetting the bushes.

I claim 1. The combination with an ink fountain,

an ink roller therein, a stationary support, and a blade secured to said support and lying in a plane substantially tangential to the roller, of means for adjusting the edge of the blade toward and from the roller, comprising a bushing adjustable in said support toward and from. the edge of the blade and a member adjustable in said bushing and adapted to engage the blade.

2. The combination with an ink fountain,

an ink roller therein, a stationary support, and a blade secured to said support and lying in a plane substantially tangential to the roller, 01 means for adjusting the edge of the blade toward and from the roller, comprising a bushing adjustable in said support toward and from the edge of the blade and a spindle threaded in and extending through the bushing and adapted to engage the blade, said spindle having a stop adapted to engage the bushing to limit the adjustment of the spindle.

- EDGAR WILTON SMITH. 

